package com.atguigu.netty.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import java.nio.charset.StandardCharsets;
import java.util.UUID;

public class MyServerHandler extends SimpleChannelInboundHandler<ByteBuf> {
    private int count;
    @Override
    protected void channelRead0(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf) throws Exception {
        byte[] buffer = new byte[byteBuf.readableBytes()];
        byteBuf.readBytes(buffer);

        //将buffer转成字符串
        String message = new String(buffer, StandardCharsets.UTF_8);
        System.out.println("服务器端接收到数据 "+message);
        System.out.println("服务器端接收到消息量= "+(++this.count));

        //服务器回送数据给客户端，回送一个随机id
        ByteBuf responseBuf = Unpooled.copiedBuffer(UUID.randomUUID().toString(), StandardCharsets.UTF_8);
        channelHandlerContext.writeAndFlush(responseBuf);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
